20523995 has 4 divisors (see below), whose sum is σ = 24628800. Its totient is φ = 16419192.

The previous prime is 20523989. The next prime is 20524003. The reversal of 20523995 is 59932502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20523995 - 2¹² = 20519899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2052395 + ... + 2052404.

It is an arithmetic number, because the mean of its divisors is an integer number (6157200).

Almost surely, 2^20523995 is an apocalyptic number.

20523995 is a deficient number, since it is larger than the sum of its proper divisors (4104805).

20523995 is an equidigital number, since it uses as much as digits as its factorization.

20523995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104804.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 20523995 is about 4530.3415985994. The cubic root of 20523995 is about 273.7919238281.

The spelling of 20523995 in words is "twenty million, five hundred twenty-three thousand, nine hundred ninety-five".